• Laboratory workers should date containers with the day, month and year they are
first opened and first received. This is required for materials that have potential to
form organic peroxides and recommended for all other materials.
• Laboratories should minimize chemical storage to only those chemicals which will
be actively used. Laboratory doors should remain closed at all times.
• Workers should not use chemicals or equipment if they have not been trained to do
• Use the following chemical storage guidelines for work with specific chemical
• Store large bottles of acids on low shelves or on trays in acid cabinets or a cabinet
• Segregate oxidizing acids from organic acids, flammable and combustible materials.
• Segregate acids from bases, active metals such as sodium, potassium, magnesium,
and other incompatible materials.
• Use bottle carriers or a cart to transporting acid bottles.
• Have spill control pillows or acid neutralizers available in the event of a spill. Do not
use bases to neutralize acid spill.
• Segregate bases from acids and other incompatible materials.
• Store large bottles of liquid bases on trays in a cabinet marked “Bases” or
• Store solutions of inorganic hydroxides in polyethylene containers.
• Have spill control pillows or caustic neutralizers available for caustic spills. Do not
use acids to neutralize base spills.
• Only store flammable liquids in a specially equipped flammable-safe refrigerator or
• Keep away from sources of ignition.
• Keep fire extinguishing and spill control equipment readily available.
• For flammable metals, have a Class-D fire extinguisher available. See “fire
extinguishers” for more information
• Store in a cool, dry area
• Store away from flammable and combustible materials, such as paper, wood, etc.
• Date the container when received and when opened.
• Store in airtight containers in a dark, cool, dry area.
• Check container for formation of peroxides, as needed, using appropriate indicator
• Dispose of peroxide forming chemicals on or before expiration date or one year
after opening, whichever is first.
• Store in a secure and upright position.
• Chain cylinders individually, 2/3 to 3/4 from the floor.
• Indicate the status of the cylinder: Full or In Use or Empty.
• When not in use, replace the valve cap.
• To transport use a cylinder cart.
• Remove all manifolds and regulators, secure the valve cap, and chain or strap the
cylinder to the cart before moving.